Function buildVisibleRows

frontend/app/treeview/treeview.tsx:109–177

(
    nodesById: Map<string, TreeNodeData>,
    rootIds: string[],
    expandedIds: Set<string>
)

}

export function buildVisibleRows(
    nodesById: Map<string, TreeNodeData>,
    rootIds: string[],
    expandedIds: Set<string>
): TreeViewVisibleRow[] {
    const rows: TreeViewVisibleRow[] = [];

    const appendNode = (id: string, depth: number) => {
        const node = nodesById.get(id);
        if (node == null) {
            return;
        }
        const childIds = node.childrenIds ?? [];
        const hasChildren = node.isDirectory && (childIds.length > 0 || node.childrenStatus !== "loaded");
        const isExpanded = expandedIds.has(id);
        rows.push({
            id,
            parentId: node.parentId,
            depth,
            kind: "node",
            label: normalizeLabel(node),
            isDirectory: node.isDirectory,
            isExpanded,
            hasChildren,
            icon: node.icon,
            node,
        });
        if (!isExpanded || !node.isDirectory) {
            return;
        }
        const status = node.childrenStatus ?? "unloaded";
        if (status === "loading") {
            rows.push({
                id: `${id}::__loading`,
                parentId: id,
                depth: depth + 1,
                kind: "loading",
                label: "Loading…",
            });
            return;
        }
        if (status === "error") {
            rows.push({
                id: `${id}::__error`,
                parentId: id,
                depth: depth + 1,
                kind: "error",
                label: node.staterror ? `Error: ${node.staterror}` : "Unable to load directory",
            });
            return;
        }

        const sortedChildren = sortIdsByNode(nodesById, childIds);
        sortedChildren.forEach((childId) => appendNode(childId, depth + 1));
        if (status === "capped") {
            const capMax = node.capInfo?.max ?? childIds.length;
            rows.push({
                id: `${id}::__capped`,